Temperature Detection Section - Toshiba e-STUDIO555 Service Manual

13.4.5

Temperature detection section

To maintain the fuser roller at a constant temperature, the two fuser roller thermistors (front and rear)
detect the fuser roller temperature and control the on/off of the IH coil. The abnormal temperature of the
IH coil is detected by the three fuser roller thermistors (front, center and rear), while that of the pressure
roller is detected by the pressure roller thermistor.
1. Relation between the thermistor output voltage and surface temperature of the fuser roller
Output voltages of thermistors [V]
Approx. 0.5
Approx. 2.0
Approx. 3.4
Approx. 3.6
Approx. 3.8
Approx. 4.0
2. Control of the surface temperature of the fuser roller
C
200
170
Temperature of
fuser roller
(Example: e-STUDIO855)
0
© 2009 - 2011 TOSHIBA TEC CORPORATION All rights reserved
Surface temperatures of fuser roller [°C]
Warming-up Ready
IH coil ON OFF ON
Fig. 13-6
13 - 7
40
100
160
170
185
200
During printing Ready
OFF ON OFF ON OFF
During During
printing waiting
ON ON
e-STUDIO555/655/755/855
FUSER UNIT
13